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Finding the Fourth Proportional to 203.91, 305.91 and 88.36

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Solution

The fourth proportional to 203.91, 305.91 and 88.36 is: 132.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.91 : 305.91 = 88.36 : x
  2. Step 2: Convert to fraction form
    203.91/305.91 = 88.36/x
  3. Step 3: Cross multiply
    203.91x = 305.91 × 88.36
  4. Step 4: Simplify right side
    203.91x = 27,030.21
  5. Step 5: Solve for x
    x = 27,030.21/203.91
  6. Step 6: Final answer
    x = 132.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.